You can search for identifiers within the package.
in-package search v0.2.0
type 'a deferred = 'a Lwt.t
type 'a t = 'a Zmq_deferred__Socket.Make(Zmq_lwt__.Deferred).t
type !'a of_socket_args = 'a
val of_socket : ('a Zmq.Socket.t -> 'a t) of_socket_args
val to_socket : 'a t -> 'a Zmq.Socket.t
val recv : 'a t -> string deferred
val send : 'a t -> string -> unit deferred
val recv_all : 'a t -> string list deferred
val send_all : 'a t -> string list -> unit deferred
val recv_msg : 'a t -> Zmq.Msg.t deferred
val send_msg : 'a t -> Zmq.Msg.t -> unit deferred
val recv_msg_all : 'a t -> Zmq.Msg.t list deferred
val send_msg_all : 'a t -> Zmq.Msg.t list -> unit deferred
val close : 'a t -> unit deferred
module Router : sig ... end
module Monitor : sig ... end